Push-Over Box

ABSTRACT

The disclosure relates to a box having an inner part and an outer part for receiving the inner part in a closed arrangement of the box. The inner part has a base wall and at least two inner side walls, each inner side wall having a respective inner locking tab abutting the outside of a respective one of the at least two inner side walls and forming a respective inner locking edge. The outer part has a cover wall and at least two outer side walls, each outer side wall having a respective outer locking tab abutting the inside of a respective one of the at least two outer side walls and forming a respective outer locking edge. The inner locking edges are in engagement with the outer locking edges in the closed arrangement of the box to prevent separation of the outer part and the inner part.

The invention relates to a push-over box comprising an inner part having a bottom wall and four first side walls and an outer part having a top wall and four second side walls, wherein the outer part can be pushed onto the inner part. Opposite to the bottom wall, the inner part has a first opening, delimited by the edges of the first side walls, for inserting and removing products. Opposite to the top wall, the outer part has a second opening, delimited by edges of the second side walls, for inserting and removing the inner part. Outer part and inner part consist of cardboard, corrugated cardboard, or another foldable flat material.

Push-over boxes are used for a variety of different products, in particular for dishwashing tablets, medicines, household cleaners, candles, cosmetics, tobacco, and other products that are not supposed to fall into the hands of children, since they often put them in their mouths, swallow them, or use them in other hazardous ways. This applies in particular to small children, kindergarten children, and children of pre-school age, i.e., up to approximately six years old. The producer of folding boxes typically produces printed blanks provided with folding lines, which are delivered lying flat in stacks to the filler of the products to be packaged, where inner part and outer part are erected and glued. In particular when producing the blanks and erecting and gluing the inner part and outer part, there can be tolerances, which cannot be so large that they prevent the outer part from being pushed over the inner part.

Proceeding from this, the invention is based on the object of creating a push-over box that is reliably protected against opening by children or other unintentional opening. This is also to be ensured in consideration of tolerances in the production of the blanks and erecting and gluing the push-over box.

The object is achieved by a push-over box as claimed in claim 1. Advantageous embodiments of the push-over box are specified in the dependent claims.

The push-over box according to the invention made of cardboard, corrugated cardboard, and/or another foldable flat material comprises

-   -   an inner part having a bottom wall and four first side walls,     -   an outer part having a top wall and four second side walls,     -   first locking tabs abutting the outsides of two opposing first         side walls, connected to the inner part via folding lines, and         forming first locking edges with their lower edges below the top         wall,     -   second locking tabs abutting the insides of two opposing second         side walls, connected to the outer part via folding lines, and         forming second locking edges with their upper edges below the         top wall,     -   wherein the first locking tabs comprise, at least at the first         locking edges, two layers of the foldable flat material from         which the inner part is formed, and/or the second locking tabs         comprise, at least at the second locking edges, two layers of         the foldable flat material from which the outer part is formed,     -   first engagement holes arranged in the two first side walls         above the second locking edges and downwardly open second         engagement holes arranged at the lower edge,     -   due to which, when the outer part is pushed onto onto the inner         part, the second locking edges are arranged below the first         locking edges, the first and second locking edges prevent the         outer part and inner part from being pulled apart by contacting         one another, by engaging the thumb and forefinger of one hand in         the first gripping openings and partially pressing the first         locking tabs together, the outer part can be gripped and the         contact between the first and second locking edges can be         prevented and by engaging the thumb and forefinger of the other         hand in the second engagement openings, the inner part can be         gripped and the outer part and inner part can be pulled apart.

In the case of the push-over box according to the invention, the first locking tabs and the second locking tabs form a lock when the outer part is pushed onto the inner part. This is because the second locking edges are then arranged below the first locking edges, so that by abutting one another or supporting one another, they prevent the outer part from being pulled off of the inner part. Pulling the outer part off of the inner part requires that the lock between the outer part and the inner part is released. To do this, the user can engage in the access openings with the thumb and forefinger of one hand and press the first locking tabs together somewhat, so that the first locking edges no longer block the path of the second locking edges. With the thumb and forefinger of the other hand, the user can grip the lower edge of the inner part through the second engagement openings and pull apart the outer part and inner part. In this case, the first locking tabs slide past the tips of the thumb and forefinger of the user, which engage in the first engagement openings and press the first locking tabs together somewhat. Because the first locking tabs each consist of two layers of the foldable flat material of the inner part at least at the first locking edges and/or that the second locking tabs each consist of two layers of the foldable flat material of the outer part at least at the second locking edges, tolerances are compensated for which can occur when producing the blanks and erecting and gluing the inner part and/or the outer part. This ensures that the push-over box is securely lockable despite the tolerances. Unlocking by a child can be prevented by dimensioning the push-over box in such a way that the child, due to the comparatively small size of his hands, is not able to engage in the engagement openings in the manner described. In addition, unlocking requires a certain understanding of the function of the locking mechanism, which is usually not yet present in a child up to the age of six. As a result, a child is prevented from unlocking the push-over box according to the invention and protected from the dangers linked thereto. In addition, the push-over box according to the invention is protected against unintentional opening, which can occur with a conventional push-over box, for example, when it is lifted on the outer part without supporting the inner part, so that the inner part slips out of the outer part.

In the present application, position specifications such as “below” and “above”, “lower” and “upper” as well as “beneath” and “above” refer to an arrangement of the push-over box, in which the outer part is pushed onto the inner part, the top wall is oriented horizontally and the second side walls are oriented vertically downward, starting from the top wall.

It is apparent that the inner part, opposite to the base wall, includes a first opening, delimited by edges of the first side walls, for inserting and removing the product. Furthermore, opposite to the top wall, the outer part has a second opening, delimited by edges of the second side walls, for inserting and removing the inner part.

According to one embodiment of the invention, the first locking tabs are connected to the first side walls by first folding lines at their upper edges. As a result, the inner part, including the first locking tabs, can be formed from a one-piece blank. The first locking tabs are firmly connected to the inner part by the first folding lines.

According to a further embodiment, the first locking tabs have inner first locking tabs abutting the outsides of the first side walls and outer first locking tabs connected to the lower edges of the inner first locking tabs via second folding lines and abutting their outsides, wherein the lower edges of the inner and outer first locking tabs jointly form the first locking edges. The inner first locking tabs and the outer first locking tabs form common double-layered first locking tabs, wherein the double-layered nature is present in particular at the first locking edges. The double-layered first locking tabs compensate for tolerances that can occur when producing the blanks and erecting and gluing the inner part and the outer part, so that the push-over box is securely lockable despite the tolerances.

According to a further embodiment, the inner first locking tabs are connected to edges of the first side walls via the first folding lines. The inner first locking tabs are connected directly to the first side walls and the outer first locking tabs are connected indirectly to the first side walls.

According to a further embodiment, the inner first locking tabs are connected to edges of the first side walls via the first folding lines. In this way it is possible that the outside of the cardboard, which forms the first side walls, is also the outside of the outer first locking tabs. This achieves a uniform appearance of the inner part.

According to a further embodiment, the first folding lines are perforation lines and/or the second folding lines are scored lines. In this way, the effort is reduced for folding the inner first locking tabs and the outer first locking tabs in different directions, since the perforation lines and the scored lines are worked into the cardboard material with relatively little effort. The second folding lines are preferably in the form of scored lines, since these form a particularly straight edge and the second folding line also defines the first locking edge.

According to a further embodiment, the first locking tabs are connected to the outsides of the first side walls by means of adhesive, wherein preferably the inner first connecting tabs are connected to the outsides of the first side walls by means of adhesive and the outer first adhesive tabs are connected to the outsides of the inner first adhesive tabs by means of adhesive. According to one preferred embodiment, these adhesive bonds are already carried out by the folding box producer. According to a further embodiment, the adhesive is applied in the form of parallel glue tracks or adhesive strips. According to a further embodiment, the glue tracks or adhesive strips extend in parallel to the first folding lines.

According to a further embodiment, the first side walls have bevels on both sides adjacent to each of the first locking tabs. This makes it easier to push the outer part onto the inner part. According to a preferred embodiment, the bevels form an angle of 45° with the adjacent edge of the first side wall.

According to a further embodiment, the second locking tabs are connected to the lower edges of the second side walls of the outer part via third folding lines. As a result, the outer part having the second locking tabs can be formed from a one-piece blank. The second locking tabs are firmly connected to the outer part via the third folding lines.

According to a further embodiment, the second locking tabs have inner second locking tabs abutting the insides of the second side walls and outer second locking tabs connected to the upper edges of the inner second locking tabs via fourth folding lines and abutting their outsides. The inner second locking tabs and the outer second locking tabs form two-layer second locking tabs. As a result, tolerances when producing the blanks, erecting and gluing the outer part and the inner part can be compensated for and secure locking of the push-over box can be ensured.

According to a further embodiment, the second locking tabs are connected to the lower edges of the second side walls via the third folding lines. As a result, the outer second locking tabs are connected directly to the second side walls and the inner second locking tabs are connected indirectly to the second side walls via the outer second locking tabs. The arrangement of the outer second locking tabs facilitates the pushing of the outer part onto the inner part and the secure locking since the outer locking tabs form smooth inner surfaces of the outer part.

According to a further embodiment, the outer second locking tabs are designed for this purpose in such a way that they completely cover the inner second locking tab. For this purpose, the outer second locking tabs are the same size or larger than the inner second locking tabs.

According to a further embodiment, the third folding lines are scored lines and/or the fourth folding lines are scored lines. Particularly straight edges are formed by the scored lines. This is advantageous in particular for the second locking edges. Because the inner and the outer second locking tabs are folded in the same directions, the scored lines of the same side can be introduced into the cardboard material. This is possible with comparatively little effort.

According to a further embodiment, the second locking tabs are connected by means of adhesive to the insides of the second side walls, wherein preferably the inner second locking tabs are connected by means of adhesive to the insides of the second side walls and the outer second locking tabs are connected by means of adhesive to the inner second locking tabs. According to a further embodiment, the adhesive is in the form of parallel glue tracks or in the form of parallel adhesive strips. According to a further embodiment, the glue tracks or adhesive strips extend in parallel to the third folding lines.

According to a further embodiment, the first engagement holes are round, oval, or rectangular and/or the second engagement holes have the shape of the upper half of a circle, oval, or rectangle.

According to a further embodiment, the first side walls and the second side walls are each connected to the adjacent side walls via folding lines extending perpendicularly to the grain direction. This is advantageous for a particularly straight formation of the edges on the folding lines mentioned.

According to a further embodiment, the shortest distance between the first finger holes and/or the second finger holes along the outsides of the upper part and/or the lower part is dimensioned such that a child of the age up to 3 years, preferably up to 4 years, preferably up to 5 years, preferably up to 6 years, cannot unlock the push-over box with both hands and pull the outer part off the inner part. The dimensioning is based on the average body measurements of a child in the EU, regardless of gender, in the respective age group.

According to a further embodiment, the distance between the outsides of the second side walls is 50 to 120 mm, preferably 70 to 100 mm, preferably 80 to 90 mm. The result of this is that a child cannot engage in all the access holes at the same time with his hands in order to unlock the folding box. However, this is easily possible for an adult.

According to a further embodiment, the second side walls protrude downwards from the lower side of the cover wall at least as far as the first side walls protrude upwards from the lower side of the lower wall of the inner part. This ensures that the dynamic pressure in a stack of push-over boxes according to the invention is transmitted via the outer part. This is particularly advantageous for the stability of the push-over boxes. According to a further embodiment, the second side walls protrude downwards from the lower side of the cover wall just as far as the first side walls protrude upwards from the lower side of the lower wall of the inner part. This ensures that the dynamic pressure in a stack is transmitted downwards via both the outer part and the inner part, which is particularly advantageous for the stability of the push-over boxes.

According to a further embodiment, the inner part is produced from a one-piece blank and/or the outer part is produced from a one-piece blank. This facilitates the production of the folding box. According to one preferred embodiment, the blanks having pre-glued locking tabs are stacked flat one on top of the other and delivered to the packer by the producer of the folding boxes. The packer erects the push-over boxes and produces the further adhesive bonds required for this and packs the products into the push-over boxes.

According to a further embodiment, the inner part consists of cardboard or corrugated cardboard and/or the outer part consists of cardboard or corrugated cardboard.

The invention is explained in more detail hereinafter with reference to the appended drawings of an exemplary embodiment. In the drawings:

FIG. 1 shows a blank of an inner part lying flat in a top view of the inside;

FIG. 2 shows the same blank after a first folding and gluing step, lying flat in a top view;

FIG. 3 shows the inner part formed from the same blank in a perspective view obliquely from above and from the side;

FIG. 4 shows a flat, unfolded blank for the outer part in a perspective view obliquely from above and from the side on the inside;

FIG. 5 shows the blank partially folded and glued in the same perspective view;

FIG. 6 shows the outer part completely erected and glued in a perspective view obliquely from above and from the side;

FIG. 7 shows the outer part and inner part before the outer part is pushed onto the inner part in a perspective X-ray image;

FIG. 8 shows the outer part pushed onto the inner part in a perspective X-ray image;

FIG. 9 shows the outer part pushed onto the inner part in a longitudinal section

According to FIG. 1 , a first blank 1 for the inner part has a bottom wall 2 which is connected at its lateral edges to four first side walls 3, 4, 5, 6 via folding lines. The bottom wall 2 and the first side walls 3, 4, 5, 6 are each rectangular.

The first side wall 3 is connected to first locking tabs 9, 10 on two opposite sides via first folding lines 7, 8. The first locking tabs 9, 10 comprise inner first locking tabs 9.1, 10.1, which are connected directly to the first side wall 3 via the first folding lines 7, 8. Furthermore, the first locking tabs 9, 10 comprise outer first locking tabs 9.2, 10.2, which are connected directly to the outer edges of the inner first locking tabs 9.1, 10.1 via second folding lines 11, 12.

The first side wall 5 is connected to dust tabs 13, 14 on both of its sides by folding lines which are parallel to one another. On the side of the first side wall 5 opposite to the side connected to the base wall 2, the side wall 5 is connected via a further folding line to a cover tab 15 which is connected to adhesive tabs 16, 17 on the two outsides. The cover tab 15 is connected at the edge opposite to the edge connected to the side wall 5 via a folding line to a further cover tab 18 which in turn is connected to a bottom tab 19 at the opposite edge via a further folding line.

According to FIG. 2 , in a first step, the outer first locking tabs 9.2, 10.2 are folded against the outsides of the inner first locking tabs 9.1, 10.1 and glued thereto. Then the cover tabs 15, 18 are folded around the folding line between cover tab 15 and side wall 5 against the side wall 5 and the bottom wall 2 and the bottom tab 19 is glued to the bottom wall 2 in the process. These steps can also be carried out at the producer of the packaging. A large number of pre-glued, flat-lying first blanks 1 can be transported in stacks to the packer.

The inner part is erected there by folding all of the first side walls 3, 4, 5, 6 vertically upward with respect to the bottom wall 2, folding the dust tabs 13, 14 against the insides of the side walls 4, 6 and gluing them thereto, folding the adhesive tabs 16, 17 against the insides of the dust tabs 13, 14 and gluing them thereto, and folding the inner first locking tabs 9.1, 10.1 against the outsides of the side walls 3, 5 and glued thereto. The inner part 20 erected and glued in this way is shown in FIG. 3 . Between the side walls 3, 4, 6 and the cover tab 15, the inner part 20 has a first opening 20.1 opposite to the bottom wall 2.

According to FIG. 4 , a second blank 21 for an outer part comprises a cover wall 22 which is connected to second side walls 23, 24, 25, 26 at the four lateral edges via folding lines. The top wall 22 and the second side walls 23, 24, 25, 26 are each rectangular, wherein the top wall 22 is almost square and the second side walls 23, 24, 25, 26 form elongated rectangles.

The second side walls 23, 24, 25, 26 are each connected to second dust tabs 27, 28, 29, 30 at parallel lateral edges via folding lines. Furthermore, the second side walls 23, 25 are connected to second locking tabs 33, 34 via third folding lines 31, 32 at the edges opposite to the edges connected to the top wall 22. The second locking tabs 33, 34 comprise outer second locking tabs 33.1, 34.1 which are connected directly to the second side walls 23, 25 via the third folding lines 31, 32. Furthermore, they comprise inner second locking tabs 33.2, 34.2, which are connected via fourth folding lines 35, 36 to the edges of the outer second locking tabs 33.1, 34.1, which are opposite to the edges having the third folding lines 31, 32.

The outer second locking tabs 33.1, 34.1 each have two sections, wherein a first section adjoining the third folding lines 31, 32 is rectangular. A second section adjoining the fourth folding lines 35, 36 is trapezoidal, wherein it widens toward the first section. The inner second locking tabs 33.2, 34.2 are also trapezoidal, wherein the lateral borders extend in continuation of the borders of the trapezoidal second part of the outer second locking tabs 33.1, 34.1. Furthermore, the inner second locking tabs 33.2, 34.2 are not as tall as the outer second locking tabs 33.1, 34.1. In the example, they are only about a quarter of the height.

In the second side walls 23, 25, first oval or circular engagement openings 37, 38 are present, which are each arranged closer to the top wall 22 than to the second locking tab 33, 34. Furthermore, second oval or circular engagement openings 39, 40 are arranged with one half in the second side wall 23, 25 and the other half in the outer second locking tab 33.1, 34.1.

According to FIG. 5 , in a first step, preferably at the packaging producer, the inner second locking tabs 33.2, 34.2 are folded against the insides of the outer second locking tabs 33.1, 34.1 and glued thereto, the outer second locking tabs 33.1, 34.1 are folded against the insides of the second side walls 23, 25, and the inner second locking tabs 33.2, 34.2 are glued to the insides of the second side walls 23, 25. Then the fourth folding lines 35, 36 are arranged between the first engagement openings 37, 38 and the third folding lines 31, 32.

The flat-lying second blanks 21 are stacked on one another in stacks and delivered to the packer.

There the side walls 23, 24, 25, 26 are erected and the second dust tabs 27, 28, 29, 30 are glued to the insides of the side walls 26, 27. The outer part 41 erected and glued in this way is shown in FIG. 6 .

The outer second locking tab 33.1, 34.1 completely covers the inner second locking tab 33.2, 34.2, so that the outer part 41 adjacent to its second opening 42 is smooth on the inside. Due to the folding of the second locking tabs 33, 34 against the insides of the side walls 23, 25, second engagement openings 39.1, 40.1 are formed on the lower edges of the outer part 41 and open downwards, the contour of which corresponds to half the contour in the blank 21.

FIG. 7 shows the inner part 20 and the outer part 41 shortly before the outer part 41 is pushed onto the inner part 20.

The superimposed inner and outer first locking tabs 9.1, 9.2, 10.1, 10.2 form first locking edges 42, 43 at the second folding lines 11, 12.

The superimposed inner and outer second locking tabs 33.1, 33.2, 34.1, 34.2 form second locking edges 44, 45 at the fourth folding lines.

When the outer part 41 is pushed onto the inner part 20, the second locking edges 44, 45 pass the first locking edges 42, 43 so that they are arranged underneath them. The push-over box 46 is shown in FIGS. 8 and 9 .

When attempting to pull the outer part 41 off of the inner part 20, the second locking edges 44, 45 abut the first locking edges 42, 43, which prevents them from being pulled apart. The user can release this locking by reaching into the first engagement openings 37, 38 with the thumb and forefinger of one hand and pressing the first locking tabs 9, 10 somewhat inwards. Then the second locking edges 44, 45 are no longer blocked by the first locking edges 42, 43. At the same time, the user can reach into the second engagement openings 39.1, 40.1 with the thumb and forefinger of the other hand, grasp the inner part 20 at the lower edge, and pull the outer part 41 and inner part 20 apart with both hands. This is not possible for a child. The cover tabs 15, 18 of the inner part 20 prevent a child from reaching into the push-over box from below.

After the product has been removed, the user can close the push-over box 46 again and, if necessary, open it in the manner described in order to remove another product. 

1. A push-over box made of foldable flat material, comprising an inner part having a bottom wall and four first side walls, an outer part having a top wall and four second side walls, first locking tabs abutting the outsides of two opposing first side walls, connected to the inner part via folding lines, and forming first locking edges with their lower edges below the top wall, second locking tabs abutting the insides of two opposing second side walls, connected to the outer part via folding lines, and forming second locking edges with their upper edges below the top wall, wherein the first locking tabs comprise, at least at the first locking edges, two layers of the foldable flat material from which the inner part is formed, and the second locking tabs comprise, at least at the second locking edges, two layers of the foldable flat material from which the outer part is formed, first engagement holes arranged in the two second side walls above the second locking edges and downwardly open second engagement holes arranged at the lower edge, when the outer part is pushed onto the inner part, the second locking edges are arranged below the first locking edges, the first and second locking edges prevent the outer part and inner part from being pulled apart by contacting one another, by engaging the thumb and forefinger of one hand in the first gripping openings and partially pressing the first locking tabs together, the outer part can be gripped and the contact between the first and second locking edges can be prevented and by engaging the thumb and forefinger of the other hand in the second engagement openings, the inner part can be gripped and the outer part and inner part can be pulled apart.
 2. The push-over box as claimed in claim 1, in which the first locking tabs are connected to the first side walls via first folding lines at their upper edges.
 3. The push-over box as claimed in claim 1, in which the first locking tabs have inner first locking tabs abutting the outsides of the first side walls and outer first locking tabs connected to the lower edges of the inner first locking tabs via second folding lines and abutting their outsides, wherein the lower edges of the inner and outer first locking tabs jointly form the first locking edges.
 4. The push-over box as claimed in claim 3, in which the first locking tabs are connected to edges of the first side walls via first folding lines.
 5. The push-over box as claimed in claim 1, wherein the first folding lines are perforation lines and/or the second folding lines are scored lines.
 6. The push-over box as claimed in claim 1, in which the first locking tabs are connected to the outsides of the first side walls by adhesive, wherein inner first connecting tabs are connected to the outsides of the first side walls by adhesive and outer first adhesive tabs are connected to the outsides of inner first adhesive tabs by adhesive.
 7. The push-over box as claimed in claim 1, which has bevels on both sides of the first side walls adjacent to each first locking tab.
 8. The push-over box as claimed in claim 1, in which the second locking tabs are connected to the lower edges of the second side walls of the outer part via third folding lines.
 9. The push-over box as claimed in claim 8, in which the second locking tabs have inner second locking tabs abutting the insides of the second side walls and outer second locking tabs connected to the upper edges of the inner second locking tabs via fourth folding lines and abutting their outsides, wherein the upper edges of the inner second locking tabs and the outer second locking tabs jointly form the second locking edges.
 10. The push-over box as claimed in claim 9, wherein the outer second locking tabs are connected to the lower edges of the second side walls via the third folding lines and are connected to the inner second locking tabs via the fourth folding lines.
 11. The push-over box as claimed in claim 8, in which the third folding lines are scored lines and the fourth folding lines are scored lines.
 12. The push-over box as claimed in claim 10, in which the second locking tabs are connected by adhesive to the insides of the second side walls, wherein preferably the inner second locking tabs are connected by adhesive to the insides of the second side walls and the outer second locking tabs are connected by adhesive to the inner second locking tabs.
 13. The push-over box as claimed in claim 1, wherein the first engagement openings are round and the second engagement openings have the shape of the upper half of a circle.
 14. The push-over box as claimed in claim 1, in which the first side walls and the second side walls are each connected to adjacent side walls via folding lines extending perpendicularly to the grain direction.
 15. The push-over box as claimed in claim 1, in which the shortest distance between the first engagement openings and the second engagement openings along the outsides of the outer part and the inner part is dimensioned such that the push-over box cannot be unlocked by a child at an age of up to 6 years.
 16. The push-over box as claimed in claim 15, in which the distance between each of the first engagement openings and the distance between each of the second engagement openings is 50 to 120 mm.
 17. The push-over box as claimed in claim 1, in which the second side walls protrude downwards from the lower side of the top wall at least as far as the first side walls protrude upwards from the lower wall of the inner part.
 18. The push-over box as claimed in claim 1, in which the inner part is produced from a one-piece blank and the outer part is produced from a one-piece blank.
 19. The push-over box as claimed in claim 1, in which the inner part is made of one of cardboard and corrugated cardboard and the outer part is made of one of cardboard and corrugated cardboard.
 20. A box comprising an inner part for holding a product and an outer part for receiving the inner part in a closed arrangement of the box, the inner part having a base wall and at least two inner side walls foldably connected to the base wall, each inner side wall having a respective inner locking tab abutting the outside of a respective one of the at least two inner side walls and forming a respective inner locking edge, the outer part having a cover wall and at least two outer side walls foldably connected to the cover wall, each outer side wall having a respective outer locking tab abutting the inside of a respective one of the at least two outer side walls and forming a respective outer locking edge, the inner locking edges are in engagement with the outer locking edges in the closed arrangement of the box to prevent separation of the outer part and the inner part.
 21. The box of claim 20, wherein the at least two inner side walls comprises a first side wall, a second side wall, and a third side wall opposite the second side wall, the first side wall extends between the second side wall and the third side wall, each inner locking tab is foldably connected to the first side wall.
 22. The box of claim 21, wherein each inner locking tab comprises a first inner locking tab foldably connected to a second inner locking tab at a respective inner locking tab fold line.
 23. The box part of claim 22, wherein each of the first inner locking tab and second inner locking tab are folded in face-to-face contact and the respective inner locking edge of each inner locking tab comprises the respective inner locking tab fold line.
 24. The box of claim 20, wherein the at least two outer side walls comprises two opposed outer side walls, each outer locking tab is foldably connected to a respective one of the two opposed outer side walls.
 25. The box of claim 24, wherein each outer locking tab comprises a first outer locking tab foldably connected to a second outer locking tab at a respective outer locking tab fold line.
 26. The box of claim 25, wherein each of the first outer locking tab and second outer locking tab are folded in face-to-face contact and the respective outer locking edge of each outer locking tab comprises the respective outer locking tab fold line.
 27. The box of claim 20, wherein each of the two outer side walls has at least one engagement hole for accessing the inner locking tab and disengaging a respective first locking edge and second locking edge.
 28. A method of forming a box comprising an inner part for holding a product and an outer part for receiving the inner part in a closed arrangement of the box, obtaining a first blank having a base wall and at least two inner side walls foldably connected to the base wall, each inner side wall having a respective inner locking tab, obtaining a second blank having a cover wall and at least two outer side walls foldably connected to the cover wall, each outer side wall having a respective outer locking tab, forming the first blank into the inner part by positioning the at least two inner side walls relative to the base wall and positioning a respective inner locking tab to abut the outside of a respective one of the at least two inner side walls and forming a respective inner locking edge, forming the second blank into the outer part by positioning the at least two outer side walls relative to the cover wall and positioning a respective outer locking tab to abut the interior of a respective one of the at least two outer side walls and forming a respective outer locking edge, inserting the inner part into the outer part and engaging the inner locking edges with the outer locking edges in the closed arrangement of the box to prevent separation of the outer part and the inner part.
 29. The method of claim 28, wherein the at least two inner side walls comprises a first side wall, a second side wall, and a third side wall, each inner locking tab is foldably connected to the first side wall, the forming the inner part comprises positioning the second side wall opposite the third wall and positioning the first side wall to extend between the second side wall and the third side wall.
 30. The method of claim 29, wherein each inner locking tab comprises a first inner locking tab foldably connected to a second inner locking tab at a respective inner locking tab fold line, the forming the respective inner locking edge comprises folding each of the first inner locking tab and second inner locking tab into face-to-face contact, the respective inner locking edge of each inner locking tab comprises the respective inner locking tab fold line.
 31. The method of claim 28, wherein the at least two outer side walls comprises two opposed outer side walls, each outer locking tab is foldably connected to a respective one of the two opposed outer side walls, each outer locking tab comprises a first outer locking tab foldably connected to a second outer locking tab at a respective outer locking tab fold line, the forming the respective outer locking edge comprises folding each of the first outer locking tab and second outer locking tab into face-to-face contact, the respective outer locking edge of each outer locking tab comprises the respective outer locking tab fold line.
 32. The method of claim 28, wherein each of the at least two outer side walls has at least one engagement hole for accessing the inner locking tab, the method comprises disengaging a respective first locking edge and second locking edge through an respective engagement hole and separating the inner part and the outer part. 